S
M
T
W
T
F
S
30
93°
71°
31
95°
70°
1
97°
69°
2
98°
70°
3
99°
71°
4
100°
72°
5
100°
71°
6
101°
75°
7
94°
73°
8
94°
73°
9
95°
71°
10
96°
67°
11
93°
68°
12
92°
72°
13
95°
69°
14
97°
70°
15
97°
71°
16
95°
73°
17
99°
73°
18
99°
73°
19
99°
73°
20
97°
74°
21
97°
72°
22
90°
70°
23
88°
65°
24
85°
62°
25
86°
65°
26
87°
64°
27
88°
62°
28
88°
63°
29
87°
62°
30
68°
55°
1
85°
63°
2
74°
62°
3
79°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Underwood
Underwood's September 2026 forecast shows daily high temperatures ranging from 68° to 99°, with overnight lows between 55° and 74°. The average high for September is 88° with an average low of 66°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Underwood. See also: October | November | December.
